The invention discloses a high-power LED phase-change heat sink structure, the heat sink body of the structure is a circular or square structure with an cavity, a boiling structure and a low temperature boiling heat transfer working medium are arranged in the cavity, a sealing end cover is arranged at the upper end of the heat sink body and tightly connected with the heat sink body, thus forming the closed cavity, the inner surface of the sealing end cover is a condensation structure, and the cavity is sealed into the vacuum state; at least one high-power LED chip is fixed at the lower end of the outside of the heat sink body, an electrode is arranged outside of the phase-change heat sink, the phase-change heat sink, the electrode and a lens are connected by packaging resin, and the high-power LED chip is directly connected with the electrode by a gold wire. The high-power LED phase-change heat sink structure utilizes the liquid-gas phase change of the working medium to realize the isothermal effect of the heat sink body to reduce the temperature difference at upper and lower ends of the heat sink, thus effectively conducting the generated heat of the high-power LED chip out, realizing the integration of the high-power LED and a high-efficiency heat radiating device and having the advantages of light weight, high power, simple structure, high heat radiation efficiency, long service life and no consumption of additional energy, etc.